<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        /*
        浮动的原理
        相对于整个页面飘浮起来了
        */
        div{
            width: 100px;
            height: 100px; 
        }
        .one{
            float: left;
            background-color: red;
        }
        .two{
            width:200px;
            background-color: blue;
        }
    </style>
</head>
<body>
    <div class="one">

    </div>
    <div class="two">

    </div>
</body>
</html>